Over DiCaprio, stopping affair later (6-2)
I believe the answer is:
toodle-oo
'later' is the definition.
(I've seen this in another clue)
'over dicaprio stopping affair' is the wordplay.
'over' becomes 'too' (I've seen this before).
'dicaprio' becomes 'leo' (Leonardo DiCaprio).
'stopping' means one lot of letters goes inside another (inserted letters stop or plug a gap).
'affair' becomes 'do' (do is a kind of affair).
'leo' inserted inside 'do' is 'dleoo'.
'too'+'dleoo'='TOODLE-OO'
(Other definitions for toodle-oo that I've seen before include "Cheerio" , "Bye-bye!" , "See you later!" , "Ta-ta" , "Goodbye (dated)" .)